Hire the Best LAN Administrators in Belgrade, RS

I’m a Network Administrator and Network Engineer with 5+ years of hands-on experience designing, configuring, and maintaining enterprise network infrastructures. My primary focus is Cisco networking technologies, where I work with routing, switching, LAN/WLAN environments, network security, and SD-WAN solutions. I currently hold the Cisco CCNP Enterprise (ENCOR) certification and I’m actively preparing for the CCNP ENAUTO certification to further expand my network automation and programmability skills. I enjoy building stable, secure, and scalable network environments — from small business infrastructures to more advanced enterprise deployments. I’m experienced with Cisco ecosystem technologies, Fortinet security solutions, and network monitoring/identity management platforms. What I can help you with: * Cisco Routing & Switching * VLANs, STP, EtherChannel * OSPF, BGP, EIGRP * LAN/WLAN Configuration * SD-WAN Deployments * Fortinet Firewall Configuration * VPN Setup & Troubleshooting * Cisco ISE (802.1X & MAB) * Network Security & Access Control * LibreNMS Monitoring * MikroTik Configuration * Network Troubleshooting * Infrastructure Optimization I’m passionate about networking, problem-solving, and delivering reliable solutions that improve performance, stability, and security. If you’re looking for someone reliable who understands both enterprise networking and real-world troubleshooting, feel free to reach out.

Available IMMEDIATELY! I am an experienced administrator proficient in VMware, Zabbix, Windows Server, Linux and networking. With a strong background in managing virtual environments, centralizing monitoring systems, and Windows servers administration, I can efficiently handle your IT infrastructure needs. VMware administration: - consulting - installing VMware infrastructure - upgrade VMware infrastructure - deploay Windows VMs - deploay Linux VMs - installing vSphere hosts - installing vCenters - creating clusters, network settings, storage settings in vCenter - installing and implementing vSphere Replication - installing and implementing vSphere Data Protection & Recovery - server migration from Hyper-v, oVirt, P2V,... - other tasks in vmware Network administration: - consulting - create VLANs - create subnets - create access lists - routing - firewall settings - monitoring - beckup - detecting network problems Windwos server administration: AD, DNS, DHCP, GPO Linux administration: zabbix, postfix, apache, mysql, graylog,...

Versatile and trained IT professional, with renowned experience in management. Exceptional management and negotiation skills. Communicative, with a lot of experience in teamwork. Seeking an opportunity to expand mine knowledge and improve already acquired skills. Microsoft System Administrator with experience in Windows administration, various server, desktop and application virtualization. Work on setting up and putting into production of advanced computer equipment (servers, various communication equipment), installation of server OS and virtualization platforms, basic configuration of the networks and network equipment. The first level of support to end users and work with clients, monitoring, diagnostics and troubleshooting of advanced IT system. Knowledge of virtualization platforms (VMware, XEN, Hyper-V). Experience in working with Active Directory.

I’m a Senior System and Network Engineer with over 18 years of hands-on experience in IT infrastructure, cybersecurity, and cloud environments. As the founder of AOVD Systems, I help businesses and professionals around the world design, secure, and optimize their digital environments — from local servers to global cloud platforms. ⸻ 🔧 What I Do I deliver end-to-end IT solutions that are secure, scalable, and cost-efficient. My core areas of expertise include: • 🖥️ System Administration & Virtualization – Microsoft Server, VMware, Hyper-V, ESXi • ☁️ Cloud & Microsoft 365 Migration – Azure AD, Exchange Online, Intune • 🔐 VPN Configuration & Network Security – IPSec, SSL VPN, SAML, Multi-factor Authentication • 🧱 Firewall & Endpoint Protection – Fortigate, SonicWall, Cisco, Huntress, FieldEffect, Defender for Business • 💾 Backup & Disaster Recovery – Veeam, Nable, Acronis, Anxient • 📈 Network Performance & Monitoring – PRTG, Nagios, ManageEngine, NetFlow Analyzer • 🔄 Managed IT Services & Remote Support – 24/7 monitoring, patch management, SLA-based response ⸻ 🌍 Who I Work With I’ve supported clients across Europe and the U.S., including: • Government and public institutions • Small and medium businesses seeking reliable IT outsourcing • Professional poker players and private clients requiring secure, anonymous, and latency-optimized VPN setups • Teams transitioning from local servers to the cloud or hybrid infrastructure I combine enterprise-level knowledge with a hands-on, personal approach — ensuring speed, security, and discretion at every step. ⸻ 🎯 Why Clients Choose Me • Proven track record of resolving complex infrastructure issues under pressure • Certified expertise across multiple vendor ecosystems (Microsoft, Cisco, VMware, Veeam) • Transparent communication and detailed technical reporting • Tailored solutions — I don’t copy-paste templates, I solve your specific problem “Vladimir fixed in one hour what others couldn’t in three days.” “Professional, responsive, and precise. My systems are finally stable.” ⸻ 🎓 Certifications & Training • Microsoft Certified Solutions Expert (MCSE) – Server Infrastructure • Cisco Certified Network Professional (CCNP) – Routing & Switching • VMware Certified Professional (VCP) – Data Center Virtualization • Veeam Certified Engineer (VMCE) – Backup & Replication • Microsoft 365 & Azure Administrator Associate • Nagios & PRTG Advanced Monitoring Implementation • ManageEngine Suite Training – Endpoint Central & NetFlow Continuous learning is part of my work ethic — I stay updated with the latest in cybersecurity, automation, and cloud technologies to deliver cutting-edge solutions to every client. ⸻ 🚀 Let’s Work Together Whether you need a VPN configuration, network performance audit, or complete IT infrastructure management, I’ll help you build systems that are secure, stable, and future-ready. 📩 Let’s connect — tell me about your IT challenge, and I’ll design a fast, professional, and cost-effective solution.

More than 20 years of working experience in networking and server administration. Administering and scripting networking applications, database applications, web applications and internet & intranet servers In position of expert engineer for networking infrastructure, IT security expert and senior linux/windows/OSX administrator In charge of designing of LAN/MAN/WAN networking infrastructure, designing and implementation of fiberoptic backbone and copper networking installation. Administration of linux servers and networking devices (switches, routers, firewalls, NAS) am in charge of more than 150 linux servers, both physical and virtual Working with L2/L3 switches, routers, firewalls, NAS devices, switching&routing protocols (RIP, OSPF, SNMP, IGRP/EIGRP, VTP, BGP). Certified Cisco and Mikrotik networking engineer. OS platforms - Red Hat/Centos, Debian/Ubuntu, Gentoo, OpenSolaris, BSD flavors, Windows, OSX Server. Networking equipment - Cisco, HP, Mikrotik, ZTE, Huawei Some of the open-source technologies and daemons I have experience with: - bash, perl and python scripting - apache/nginx web servers (standalone, or in backend mode for tomcat, with one or many virtual hosts) - mysql/postgresql database installation and administration - squid (with or without dansguardian+clamav as content filter/realtime AV) - cloud (openstack, AWS, Azure, gcloud, OVH, rackspace, digital ocean....) - snort (with BASE and Snorby as web GUI) and suricata IDS - iptables (with or without web GUI) - BIND (standalone or master/slave) - postfix (as MTA, combined with alot of different tools such as spamassassin, amavis, clamav, roundcube, postfixadmin, dovecot, cluebringer, mailgraph) - zenoss, zabbix and cacti (with plugins and OUIs) - dovecot (as pop3/imap server of choice, combined with postfix and amavis, clamav, roundcube, postfixadmin, spamassassin) - amavis (with alot of customized settings for things such as double AV scanning, DKIM support, catching of spam headers...) - spamassassin (standard and heuristic bayesian analysis, fine tuning of scoring, OCR integration, SPF integration....) - ClamAV (using both standard and unofficial virus definitions, making of 0-day virus signatures caught in the wild...) - freeradius (with MySQL backend for AAA) - samba (in all possible variatons - standalone simple CIFS sharing, member of windows AD, standalone AD controller, one of the controllers in windows AD) - pureftpd, vsftpd and proftpd (as standalone servers or with virtual users) - xen, vmware, hyperv and kvm virtualization (stock or Xenserver/Proxmox distributions) - asterisk (via Elastix linux distribution) - roundcube as preferred web-mail interface (with alot of customized plugins) - openmediavault/openfiler linux distros for NAS - HA clustering (failover based on DRBD and heartbeat/pacemaker+corosync) - NUT (daemon for UPS monitoring and controlling) - openvpn (with various configurations and backends) - pptp vpns (with various configs and backends) - all kind of linux distributions - RH, CentOS, openSuSe, Debian, Ubuntu, Gentoo, Arch.... - hardening of linux distributions (iptables, fail2bain, allow/deny mechanism, AIDE, SELinux, AppArmour, occasional pen testing) - puppet automation - rancid (centralized backup of config files) - bacula, urbackup and rsync backup

I'm a Network Administrator and Cisco certified professional in Routing & Switching, Security, Voice and Wireless with over 13 years of experience in the field. Got also a lot of experience in Troubleshooting, Networking, Vulnerability Scanning and Mitigation, Windows Desktop Migration, Active Directory, and servers issues. My goal is to always be on time, consistent and pleasant to work with.Trying always to keep your IT infrastructure up and running. So I look forward to having the pleasure of working with you.